Sight-glass for water-cooling systems.



SIGHT-GLASS FOR WATER-GOOLNG SYSTEMS.

iecicaii.

Specification of Letters Patent.

lllateiited Mair, mi, lltlll.,

Application filed October 21, 1916. Serial No. 126,93'i.

tain new and useful Improvements in Sight- Glasses for VVater-Cooling Systems, of which the following is a specification.

This invention relates broadly to sight glasses for water cooling systems, and more particularly to a sight glass for automobile radiators. y

The primary object of the invention is to provide a device which permits a view of the action of the water in automobile cooling systems of that character wherein an auxiliary tank or container for water is employed.

In such cooling systems as ordinarily employed, the lower end of the usual overflow pipe` of the radiator is connected to a'con densing coil located within a tank which is disposed at a convenient point on4 the automobile. Vapor due to heating of the water escapes through the overflow pipe and pa-l ingV through the coil is condensed. Also, as the water expands, due to heating, it rises in the radiator to a level where it overflows into the open end of the conductor pipe leading to the condenser coil, whence it 'passes to and through said coil and is stored in the tank. On the other hand, when the water in the circulating system cools slightly below `that temperature which a'ords greatest motor elliciency, as when the throttleis closed, the water in the radiator recedes and a vacuum is created in the upper part of the latter, which acts to draw water from the tank through the coil and discharge it from the conductor pipe into the radiator, refilling 'the latter. 'l As above indicated, the chief object of the present invention is to provide, in assoeii-i tion with a cooling system of the general character referred to, means whereby the action of the water as it overllows into the conductor pipe and as it returns through said pipe to the radiator, as aforesaid, may be exposed to view, permitting observation.

In describing the invention in detail, reference is herein had to the accompanying drawings, in which`- Figure 1 is a side elevation of the invention, and 4 Fig. 2 is a central vertical section of the same.

l Referring to said drawings, in which like designating characters distinguish like Aparte throughout the several viee-'sl indicates the usual filler tube provided at the top of an automobile radiator.- Ordinarily such tube is closedby a suitable threaded cap or cover, but the present nvention contemplates the replacement of such 4cap or cover by a device embodying a transparent sight glass, as 2. Said glass 2 is preferably of upright bulbous form having its lower end open and rigidly seated upon or clamped to a hollow axially alined metal member 8 having a neck portion l adapted for threaded engagement with the filler tube l. ilihile the means of connecting the glasefA 2 to the member 3 may be varied, li prefer the means herein illustrated, the same involving in the formation of -the glass an annular horizontal base flange 5 and also the provision or' a horizontal seat 6 in the member 3. Said base flange 5 is designed to seat upon the seat (3, a suitable gasket 7 being preferably inten posed between said parte. @verlying said flange 5 is-asecond gasket t3 upon which rests an `externally threaded clamping ring 9 which is adapted to be adjusted, as by a Spanner wrench, for exerting clamping pressure upon said ilange, said ring being disposed in threaded relation with an npright annular l0 provided at the outer edge oi the seat G of said metal member 3.

'lhe conductol1 pipe 'll is so disposed in the radiator that it rises vertically within the bulb or glass 2 to a point which is'substantially central with respect to the latter, as shown. i

ln practice, wien 'the weier in the radiator rises above the level et the upper endv ci' the pipe l1, it overl-lows into the latter whence it is conducted through said pipe to the auxiliary water tank (not shown). W' hen the water wit iin the radiator cools,

it recedes from the bulb 2, producing a.

t3 li vacuum which acts to return water from said tank to the radiator, such water being discharged from the upper end of said pipe 1l in a jet or in the manner oi a iountain.

As is obvious the arrang,D nent of the upper end of the pipe within the l:dass bulb prol lll The combination with the llller tubeet.

an automobile radiator, olf a pipe proj g Lak-m4n upward tHlough Said tube to a point above the top of the latter and having its upper end open, said pipe serving alternately :as an vriow pipe and aS a vucuunl-induced filler pipe' for the radiator, und a glass Cup mounted upon said tube n nclosug reation to said pipe and exposing to View the action of he water in entering and discharging fl'omsnd open end, sfd @up being wholly open at its lower end to prm un-` ture in presence of two subscriloingYy wit) messes.

JUHN G. LUKENS.

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